Topic Navigator

Noun Tree | Nouns Groups | Verb Groups | Search

Parent Categories

entity go
that which is perceived or known or inferred to have its own distinct existence (living or nonliving)

physical entity go
an entity that has physical existence

matter go
that which has mass and occupies space

substance go
the real physical matter of which a person or thing consists

activator go
(biology) any agency bringing about activation

accelerator, catalyst go
(chemistry) a substance that initiates or accelerates a chemical reaction without itself being affected

enzyme go
any of several complex proteins that are produced by cells and act as catalysts in specific biochemical reactions

phosphatase
any of a group of enzymes that act as a catalyst in the hydrolysis of organic phosphates

noun.substance

bottom of branch